Apparatus for repairing incandescent electric lamps.



E. CERVENKA. APPARATUS FOR REPAIRING INCANDESCENT ELECTRIC LAMPS.

APPLICATION FILED JULY 2.1914.

Patented Apr. 23,1918.

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i1 OF PARIS, JEANCE.

PATHS FOR BJEPING INCANDESCENT ELECTRIC LAMPS.

Specification of Letters Patent. P gmented Apr. 23, hmlfio Applicationfiled July 2, 1914. Serial No. 848,653.

To all whom it may concern:

Be it known that ll, EMANUEL Cnavnnm, subject of King of Hungary,residing at Paris, 9 Boulevard Bonne-Nouvelle, in the Republic ofFrance, engineer, haveinvented certain new and useful Improvements inApparatus for Repairing Incandescent Electric Lamps, of which thefollowing is a specification.

This invention relates to apparatus for repairing incandescent electriclamps, and especially those having a metallic filament.

The object of the invention is to provide an apparatus allowing the easyand sure cutting of the bulbs accordin to a plane perpendicular to theiraxis. or such purpose the apparatus comprises means whereby to make aslight slit or cut at the surface of the bulb, on a circularline, by theaction of a cutting tool such as a diamond or other similar matter, andmeans Whereby to develop such superficial slit or cut,'by the action ofheat, in order to obtain a complete separation of both the parts of thebulb in a very sure and neat manner.

One embodiment of this invention is shown by way of example in theaccompanyinfi drawings, in which V igure 1 1s an elevation and Fig. 2 aplan of the apparatus according to this invention.

The apparatus shown comprises a base a on which is mounted a verticalrod 6 on which are slidable and rotatory five arms c 01 e f g, which canbe set in any'required position by means of screws 0 al e f g.

The lowermost arm 0 serves to support the bulb it while being slit bythe cutting tool d. 'Such arm 0 is composed of two parts 0 0 one ofwhich is slidable and rotatory in the other and can be set in anyrequired position by means of a screw 0 The part c terminates in aneyelet c in which can pass freely a bolt 0 which is secured in place bya nut c, the head of such bolt having a hollowed out axial hole toreceive the tubular point 723 of the bulb.

The arm at located above the arm 0 serves to car the cutting tool dwhich consists of a cy indrical rod terminatin in a cutting point. Tnorder to allow sue tool to revolve in any direction, a jointed tool isprovided, comprising a washer cl secured on the end of the arm at b anut d and a socket d which is secured to the washer d by a nut at, ednuts d and d 1mm g screwed on threaded stems which are asso- I thelatter is pressed against the cutting tool; Such rest consists of a flatblade and is so mounted as to be able to revolve in a horizontal planeon the lower end of the arm (3 l which is elbowed near the bottom; itcan be secured in any desired position by means of a nut 6 such nutbeing screwed on a threaded extension of the arm e.

The arm fserves to support the bulb it after the latter is slit by thecutting tool cl and while it is subjected to the heat action of thecleaving tool 9 The arm f is similar to the arm 0 and also carries abolt f", the head of which has a recess to receive the tubular point ofthe bulb.

he arm 9 supports the heat cleaving tool 9 the latter consists of apiece of matter conductor of heat, which has the shape of a crescent andthe inner edge of which is beveled, the radius of the curve of such edgebeing greater than the radius of the section of the bulb (see Fig. 2).Such tool is socured to an electric heating device comprising a hollowcylindrical body which incloses a heating resistance (not shown)connected to two terminals which are mounted on a plate of insulatingmatter 9'. that need be done is to connect such terminals to the polepieces of a suitable source of electricity to allow of the currentheating the resistance and hence the cleaving tool g. The body 9 isslidable and rotatory in a split collar 9 and can be set therein, in anyrequired position, by means of a screw such collar is associated with abolt 9 which passes freely through the end of the arm 9 so as to beenabled to revolve and which can be set by a nut g".

The positlon of the arms 0 a e f g is regulated according to theproportions of the bulbs and the position of the desired section 21. Thebulb being placed on the support 0, its point being loosely engaged inthe axial hole of such support and 1ts axis being vertical, the tool atand the rest c are so ad justed as to bear against the periphery of thebulb at points not diametrically opposite so as to be able to keepthe-bulb against the tool by means of a pressure suitably directed. Thenin turning the bulb by hand, there is obtained a slight cut or slit atthe surface of such bulb on the circle 2'. Afterward the bulb is put onthe support 7*". The

, heat cleaving tool 9 being adjusted in such a manner that its innerridge lies exact. Y tangent to the circle '5, and being heated to asuitable temperature by the electric current all that need be done is toturn the bulb while holding the same. in contact with the said ridge inorder to deepen the superficial cut on the circle '11 to the thicknessof the glass under the influence of the local and progressive heating ofthe latter. There is thus obtained very easily a very clear separationof the bulb on the circle 2', which allows of repairing the said bulband allows also if desired of soldering the two parts of the bulbtogether.

By reason of the crescent shape of the tool 9 the position of the bulbpressed against the latter is kept stable although the said bulb onlybears against the tool by a single 'sidewise to be cut on the sideopposite from 7 ing adjustable in naeacaa that of the cutting tool, allof said arms beependently of each other angularly around the upright andvertically thereon.

2. An apparatus for sectioning the bulb of incandescent lamps comprisingthe combination of a support, arms adjustably mounted on such support,two bolts of support respectively on two of the said arms, each of suchbolts having a cavity therein for the purpose of receiving the point ofthe bulbs, stripin means on another of the said arms adapted to stripethe glass superficially, and heat cleaving means comprising, a piece ofmatter conductor of the heat and a heating device for such piece, thesaid cutting tool and the said piece being placed with regard .to thetwo sa1d bolts of support respectively at the same height for thepurpose of bearing against the same points of the bulbs placed on thebolts.

3. In any apparatus for sectioning the bulbs of incandescent lamps, heatcleaving means comprising a piece of matter which is a good conductor ofthe heat, having the shape of a crescent, and a heating device for suchpiece, the inner end of the said piece having a curved radius greaterthan that of the surface of. the bulbs to be sectioned, and having atransversal section beveled.

In testimony, that I claim the foregoing as my invention I-have signedmy name in presence of two subscribing witnesses.

EMANUEL 'OERVENKA.

Witnesses CHAs. P. PREssLY, MAURICE Roux.

